Identifying Nonstationary Clock Noises in Navigation Systems

[摘要] The stability of the atomic clocks on board the satellites of a navigation system shouldremain constant with time. In reality there are numerous physical phenomena that make thebehavior of the clocks a function of time, and for this reason we have recently introduced thedynamic Allan variance (DAVAR), a measure of the time-varying stability of an atomic clock. Inthis paper we discuss the dynamic Allan variance for phase and frequency jumps, two commonnonstationarities of atomic clocks. The analysis of both numerical simulations and experimentaldata proves that the dynamic Allan variance is an effective way of characterizing nonstationarybehaviors of atomic clocks.

[学科分类] 电子、光学、磁材料